The Fourier Transform is a mathematical tool that breaks down a signal into its constituent sine and cosine waves of different frequencies. For a 2D signal like an image, it reveals the image's frequency components.
- Input Canvas (Spatial Domain): This is the image itself. Draw any shape you like!
- Output Canvas (Frequency Domain): This shows the result of the transform.
- The center of the canvas represents the lowest frequencies (overall brightness).
- Points further from the center represent higher frequencies (fine details and sharp edges).
- Bright spots indicate dominant frequencies in the input image. A horizontal line in the input will create a vertical line of frequencies in the output, and vice versa.